<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>

</head>

<style type="text/css">
    *{
        margin: 0;
        padding: 0;
    }
    input, .di{
        display: none;
        background-color: #06fad2;
        width: 4rem;
        padding: .2rem;
        margin-bottom: .5rem;
        margin-left: 2rem;
        position: relative;
    }
    .di:before{
				width: 0px;
				height: 0px;
				content: "";
				border-bottom: 8px solid transparent;
				border-left: 10px solid #06fad2;
				position: absolute;
				top: 24px;
				left: 18px;
			}
    input:checked ~ .di {
        display: block;
    }
   
</style> 
<body>
    <div>
        <input id="menu" type="checkbox"/>
        <div class="di">三甲/19</div>
    </div>
<label for="menu">急速问诊</label>
</body>
<script>

</script>
</html>